Co–Star Personalized Astrology

4.6
95.3K reviews
5M+
Downloads
Editors' Choice
Content rating
Teen
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About this app

Co–Star is the astrology app that deciphers the mystery of human relations through NASA data and biting truth. 2x App of the Day. Featured in the New York Times, Vogue, Vanity Fair, and more.

> "Good advice." New York Times
> "Banging astrology app." Dua Lipa
> "Connect with people about your astrology sign." Conor Oberst

Features
• Add friends to compare natal charts and see your compatibility.
• Read personalized daily horoscopes.
• Receive daily push notifications based on your horoscope for the day.
• Learn how to read your entire birth chart.

Premium Features
• See the full natal chart of somebody who doesn’t have the app.
• Get a complete personalized report on how you love and why.
• For couples, Eros, a feature that gives you insight on how to navigate everyday relationship situations based on your zodiac compatibility.

There are no bad zodiac signs, only complicated dynamics. Co–Star uses astrology as a framework for understanding ourselves and our relationships; a shortcut to real talk in a sea of small talk. We use NASA data to chart the exact location of the stars in real-time. This is then interpreted by real human astrologers who collaborate with AI technology to produce the birth chart and daily horoscopes you read in the app.

Follow us everywhere
• Instagram: https://www.instagram.com/costarastrology/
• Tiktok: https://www.tiktok.com/@costarastrology
• Twitter: https://twitter.com/costarastrology

Need help? Email us: [email protected]
We don't do creepy stuff with your data —> costarastrology.com/privacy
Terms —> https://www.costarastrology.com/terms
Updated on
Feb 18, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, Messages and 3 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.6
94.1K reviews
Amanda
February 26, 2026
I've gone rounds with this app. I've deleted it and redownloaded it several times. The accuracy is humbling. I recommend this app to everyone I know. If you take what it says, you can learn things about yourself and use the information to guide you and help you grow. I look forward to what the next day will bring, knowing it will be relevant and useful. Some readings really boost me up. Others bring me down to earth and ground me. I hope people see my rating and choose to download the app!
7 people found this review helpful
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jojo A
January 20, 2026
I love this app! all in all it's amazing app. I unfortunately am on a budget. very strict budget so I am never able to afford all the little extras. although I did download one time but that was even I had to budget for. it. sounds silly as it seems so small for some but for others it's a little bit bigger. but I love that you get your horoscope and it breaks things down in a personal way per your birth chart.
13 people found this review helpful
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Pamela Shapiro
January 18, 2026
Cute app to see friends astrology and how you interact but descriptions are not nuanced and many houses are inappropriately calculated. They regularly have a sign listed in multiple houses (not planets - houses), which is not possible. I've noticed this on multiple friends charts including some of my family who I paid to include (they don't have the app). I know enough to see that it's incorrect but many others would not.
6 people found this review helpful
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What’s new

The only thing that’s certain is that technology will break. We’ve fixed bugs for now.